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The Need for Different Data Types

Let's explore different data types and how they can be used.

Integer Data Type

Definition: Integers are whole numbers, both positive and negative, including zero.
Usage:
1. Counting: Number of items, iterations in a loop.
2. Indexing: Accessing elements in arrays or lists.
3. Identifiers: Unique IDs for objects or records.

Example

In a Person object, the age attribute would be an integer, as it represents a whole number without fractions.

public class Person{
  private int age;
  ...
}

Real Data Type

Definition: Real numbers (also known as floating-point numbers) include fractions and decimals.
Usage:
1. Measurements: Height, weight, temperature.
2. Calculations: Financial transactions, scientific computations.

Example

In a Vehicle object, the fuelEfficiency attribute might be a real number, representing miles per gallon with decimal precision.

public class Vehicle{
  private double fuelEfficiency;
  ...
}

String Data Type/Class

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Note

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Excepteur sint occaecat cupidatat non proident

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Tip

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Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

D.1.5 Data Types for Representing Data Notes

The Need for Different Data Types

Integer Data Type

Real Data Type

String Data Type/Class

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Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Introduction to Data Types

1. System fundamentals2 subtopics

2. Computer organization1 subtopic

3. Networks1 subtopic

4. Computational thinking, problem-solving and programming3 subtopics

5. Abstract data structures (HL)1 subtopic

6. Resource management (HL)1 subtopic

7. Control (HL)1 subtopic

A. Databases4 subtopics

B. Modelling and simulation4 subtopics

C. Web science6 subtopics

Object-oriented programming (OOP)4 subtopics

D.1.5 Data Types for Representing Data Notes

1. System fundamentals2 subtopics

2. Computer organization1 subtopic

3. Networks1 subtopic

4. Computational thinking, problem-solving and programming3 subtopics

5. Abstract data structures (HL)1 subtopic

6. Resource management (HL)1 subtopic

7. Control (HL)1 subtopic

A. Databases4 subtopics

B. Modelling and simulation4 subtopics

C. Web science6 subtopics

Object-oriented programming (OOP)4 subtopics

The Need for Different Data Types

Integer Data Type

Real Data Type

String Data Type/Class

Unlock the rest of this chapter with a Free account

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Introduction to Data Types